Supebheater



UNITED 4STATES PATENT OFFICE.

H. VILLIAM ELLIQOTT, lOF BALTIMORE, MARYLAND.

SUPEBHEATER.

SPECIFICATION forming part of Letters Patent No. 292,92, dated January 22, 1884.

' Application tiled August 21, 18834. (No model.) A

To all whom, it may concern.-

Be it known that I, II. WILLIAM- ELLIcoTT, of the city of Baltimore and State of Maryland, have invented certain Improvements in Superheaters, of which thefollowingis a specification.

My invention relates to improved means for producin'g dry and superheated steam; and it consists in combining with a boiler and its furnace a combustionchamber, to which the products of imperfect combustion from the tubes or ilues of theboil'er are discharged and combined with atmospheric air or other elements which will :rendern their combustion complete. Further,Iprovideaheating-chamber separated from the combustion-chamber by a perforate fire-brick arch or partition, and inclose within the said heatingchamber a pipe or series of pipes, to which steam is admitted from the boiler to. be superheated, and from which it is conducted to the engine. These pipes are protected against the direct action of heat by being incased in fire-brick or other refractory material( l In the further description of my said in vention which follows, reference is made to the accompanying drawings, forming a part hereof,

Figure I is a longitudinal view,.partly in section, of a boiler `and furnace to which my improvements arev applied; and Fig. II is a ectional plan taken on the dotted line X X,

Similar letters of reference indicate similar parts in both views.

A is the boiler, and 'B the furnace, which in themselves are of ordinary construction. The furnace has grate'bars aand a furnace' door, b, as is usual. 0

. C is the combustionchamber, situated,in the present case, in front of the furnace B; and D, the heating-chamber, separated from the combustion-chamber lby .a perforate arch, c.

E is a gang of pipe, or a 'steam-reservoir, which rests upon the perforate arch c, and is connected tothe steam-drum of theboiler. The pipe E is covered with some refractory heat-retaining substance, such as fire-brickor fire-clay, and when the former is used the bricks are dovetailed together, or interlocked, to prevent their displacement. The exit-pipe e for the superheated steam is..sh-own in dotted lines and only in Fig. II.- The combustion-chamber is preferably provided with adrawings, Fig. I, and has apertures for the admission of air. In. some cases burners (represented by h, Fig. I) are inserted through the wall of the combustion-chamber, and hydrocarbon iiuid injected.

Supposing the furnace B to be provided with a bed of fuel on the grate, the operation of the invention is as follows: Smoke and gases from the fuel inthe furnace B pass over the bridge-wall to the rear end of the boiler, and return through the tubes or iues to the combustion-chamber C, where they are united with atmospheric air, orwitli some'combustr ble elements, and consumed, the necessary heat to produce perfect combination of the elements being eected by fuel on the grate f of the combustion-chamber, or by burning hydrocarbon fluid, which is introduced to the said chamber through theV burners h. The heated products of combustion pass to the heating-chamber through the perforate arch or partition c, and are brought in contact with the covered pipe E, which contains saturated steam, and change the globules of water into dry steam at a high temperature.

From the foregoing it will be understood that with my improved apparatus saturated steam is changed to superheated dry steam by the action of the superheated products of imperfect combustion from the furnace, and after they'have been re-enforced by air or any other elements which may be found necessary to render their combustionv complete, and that.

the pipes in which the steam is superheatedl are protected by the fire-brick casing against the destructive action of gases, &c., at a high temperature.

I claim as my invention- In combination with a boiler and furnace,

a combustion-chamber to whichv the products of imperfect combustion are introduced, and

Vin which they are combined with other elements to assist in Vtheir thorough consumption, a heating-chamber separated from the combustion-chamber by a perforate partition, and a steam-receptacle located in the said heatingchamber and connected by a steam-pipe to the steam-space ofthe boiler, substantially as specied.

H. NVM. ELLICOTT. Vitnesses: WM. T. HOWARD, RENOUX Rnnsn.

IOO 

